0002089787 1 2026-08-26 2026-08-26 0002089787 2 2026-08-26 2026-08-26 0002089787 3 2026-08-26 2026-08-26 0002089787 4 2026-08-26 2026-08-26 0002089787 2026-08-26 2026-08-26 iso4217:USD pure shares S-1 EX-FILING FEES 0002089787 N/A N/A S-1 RainRock Acquisition Corp. false Equity Units, each consisting of one Class A ordinary share, par value $0.0001, and one right to receive one tenth (1/10) of a Class A ordinary share true 17250000 10.00 172500000.00 0.0001381 23822.25 false Equity Class A ordinary shares included as part of the Units true 17250000 0.0001381 0.00 false Equity Share Rights included as part of the Units true 17250000 0.0001381 0.00 false Equity Class A ordinary shares underlying the Share Rights included as part of the Units true 1725000 10.00 17250000.00 0.0001381 2382.23 189750000.00 26204.48 0.00 0.00 26204.48 Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.<br/><br/>Represents 17,250,000 units, including 15,000,000 units to be issued in the offering and up to 2,250,000 units which may be issued upon exercise of a 45-day option granted to the underwriters to cover over-allotments, if any, each consisting of one Class A ordinary share and one right to receive one tenth (1/10) of a Class A ordinary share. Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.<br/><br/>Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from share splits, share capitalizations or similar transactions.<br/><br/>No fee pursuant to Rule 457(g). Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.<br/><br/>Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from share splits, share capitalizations or similar transactions.<br/><br/>No fee pursuant to Rule 457(g). Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.<br/><br/>Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from share splits, share capitalizations or similar transactions.